1//===---------- UsingInserter.h - clang-tidy ----------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9#ifndef LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_USINGINSERTER_H
10#define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_USINGINSERTER_H
11
12#include "clang/AST/Decl.h"
13#include "clang/AST/Stmt.h"
14#include "clang/Basic/Diagnostic.h"
15#include "clang/Basic/SourceManager.h"
16#include <optional>
17#include <set>
18
19namespace clang::tidy::utils {
20
21// UsingInserter adds using declarations for |QualifiedName| to the surrounding
22// function.
23// This allows using a shorter name without clobbering other scopes.
24class UsingInserter {
25public:
26 UsingInserter(const SourceManager &SourceMgr);
27
28 // Creates a \p using declaration fixit. Returns ``std::nullopt`` on error
29 // or if the using declaration already exists.
30 std::optional<FixItHint>
31 createUsingDeclaration(ASTContext &Context, const Stmt &Statement,
32 llvm::StringRef QualifiedName);
33
34 // Returns the unqualified version of the name if there is an
35 // appropriate using declaration and the qualified name otherwise.
36 llvm::StringRef getShortName(ASTContext &Context, const Stmt &Statement,
37 llvm::StringRef QualifiedName);
38
39private:
40 using NameInFunction = std::pair<const FunctionDecl *, std::string>;
41 const SourceManager &SourceMgr;
42 std::set<NameInFunction> AddedUsing;
43};
44
45} // namespace clang::tidy::utils
46#endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_USINGINSERTER_H
47

source code of clang-tools-extra/clang-tidy/utils/UsingInserter.h